{
  "$type": "site.standard.document",
  "description": "A wireless power transmission system according to the present invention includes: a pair of antennas 107 and 109 , between which power is transmissible wirelessly by resonant magnetic coupling at a frequency f0 , one of which is a series resonant circuit, and the other of which is a parallel…",
  "path": "/patents/977833",
  "publishedAt": "2014-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J50/12",
    "PANASONIC CORP [JP]"
  ],
  "textContent": "A wireless power transmission system according to the present invention includes: a pair of antennas 107 and 109 , between which power is transmissible wirelessly by resonant magnetic coupling at a frequency f0 , one of which is a series resonant circuit, and the other of which is a parallel resonant circuit; and a control section 100 , which controls a transmission frequency according to the magnitude of the power being transmitted between the antennas 107 and 109 . If the power transmitted between the antennas is greater than a reference value P1 , the control section 100 sets the transmission frequency to be a value that falls within a first level range that is higher than the frequency f0 . But if the power is smaller than the reference value P1 , then the control section 100 sets the transmission frequency to be a value that falls within a second level range that is lower than the first level range.",
  "title": "WIRELESS POWER TRANSMISSION DEVICE"
}